Vacuum Metallizing
Vacuum Metallizing Process
Vacuum metallizing is a form of physical vapor deposition, a process of combining metal with a non-metallic substrate through evaporation. The most common metal used in the vacuum metallization is aluminum for a variety of reasons such as cost, thermodynamic, and reflective properties. The evaporation takes place by feeding aluminum onto heated sources or boats, which operate at approximately 1500°C (2700°F). The vacuum metallizing chamber's atmosphere is evacuated to a vacuum level suitable for the evaporation of the aluminum wire. Upon contact with the substrate being processed, the aluminum vapor condenses and creates a uniform layer of vacuum deposited aluminum.
Vacuum Metallization for Aesthetics
Vacuum Metallization is done for many reasons; aesthetically it adds a unique appearance. The metallized substrate can have a highly reflective mirror like finish or be used in conjunction with other processes, like coating or laminating, to create a decorative effect. Film that has undergone vacuum metallization can also be dyed and/or coated to give the substrate a unique color. Additionally, any vacuum metallized film can be laminated to a variety of other substrates, such as leather and synthetic fabrics, to give the material a unique and high end appearance. Some additional decorative possibilities include:
Vacuum Metallizing for Insulation Applications
Vacuum metallizing is primarily used to increase functionality of a substrate. A vacuum metallized surface is ideal for insulation, mostly because of its increased reflectance/ radiant properties. Commercial and residential
radiant barrier reflective insulation materials get their functionality from the vacuum metallization process. Thermal insulation systems that are used to protect space crafts are constructed of multiple layers of vacuum metallized polyimide films.
Vacuum Metallization Increases Barrier Properties
Another function derived from the vacuum metallization process is increased barrier properties. Metallization of a plastic substrate makes in a great moisture and air barrier. Applications include food & beverage packaging and medical applications. Furthermore, the vacuum metallizing process decreases the substrates light transmission making it an effective light barrier. The light transmission is controlled by the amount of vacuum deposited aluminum. Some functional barrier and insulation applications include:
Contact DUNMORE for More About Vacuum Metallizing
DUNMORE Corporation has been Vacuum Metallizing for nearly forty years, please
contact us to find out more about metallization and related services.
